Chinese vaccines “don’t have very high protection rates,” said the director of the
“It’s now under formal consideration whether we should use different vaccines from different technical lines for the immunization process,” Gao said.
The effectiveness rate of a coronavirus vaccine from Sinovac, a Chinese developer, at preventing symptomatic infections has been found to be as low as 50.4% by researchers in
Gao gave no details of possible changes in strategy but mentioned mRNA, a previously experimental technique used by Western vaccine developers while China’s drug makers used traditional technology.
“Everyone should consider the benefits mRNA vaccines can bring for humanity,” Gao said. “We must follow it carefully and not ignore it just because we already have several types of vaccines already.”
Gao previously raised questions about the safety of mRNA vaccines. He was quoted by the official
Chinese state media and popular health and science blogs also have questioned the safety and effectiveness of the
As of
Experts say mixing vaccines, or sequential immunization, might boost effectiveness rates. Trials around the world are looking at mixing of vaccines or giving a booster shot after a longer time period. Researchers in
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